143 lines
4.4 KiB
C
143 lines
4.4 KiB
C
/* Iterate over a process's threads.
|
|
Copyright (C) 1999, 2000 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
#include "thread_dbP.h"
|
|
#include <alloca.h>
|
|
|
|
static int
|
|
handle_descr (const td_thragent_t *ta, td_thr_iter_f *callback,
|
|
void *cbdata_p, td_thr_state_e state, int ti_pri,
|
|
size_t cnt, pthread_descr descr)
|
|
{
|
|
struct _pthread_descr_struct pds;
|
|
size_t sizeof_descr = ta->sizeof_descr;
|
|
td_thrhandle_t th;
|
|
|
|
if (ps_pdread (ta->ph, descr, &pds, sizeof_descr) != PS_OK)
|
|
return TD_ERR; /* XXX Other error value? */
|
|
|
|
/* The manager thread must be handled special. The descriptor
|
|
exists but the thread only gets created when the first
|
|
`pthread_create' call is issued. A clear indication that this
|
|
happened is when the p_pid field is non-zero. */
|
|
if (cnt == 1 && pds.p_pid == 0)
|
|
return TD_OK;
|
|
|
|
/* Now test whether this thread matches the specified
|
|
conditions. */
|
|
|
|
/* Only if the priority level is as high or higher. */
|
|
if (pds.p_priority < ti_pri)
|
|
return TD_OK;
|
|
|
|
/* Test the state.
|
|
XXX This is incomplete. */
|
|
if (state != TD_THR_ANY_STATE)
|
|
return TD_OK;
|
|
|
|
/* XXX For now we ignore threads which are not running anymore.
|
|
The reason is that gdb tries to get the registers and fails.
|
|
In future we should have a special mode of the thread library
|
|
in which we keep the process around until the actual join
|
|
operation happened. */
|
|
if (pds.p_exited != 0)
|
|
return TD_OK;
|
|
|
|
/* Yep, it matches. Call the callback function. */
|
|
th.th_ta_p = (td_thragent_t *) ta;
|
|
th.th_unique = descr;
|
|
if (callback (&th, cbdata_p) != 0)
|
|
return TD_DBERR;
|
|
|
|
/* All done successfully. */
|
|
return TD_OK;
|
|
}
|
|
|
|
|
|
td_err_e
|
|
td_ta_thr_iter (const td_thragent_t *ta, td_thr_iter_f *callback,
|
|
void *cbdata_p, td_thr_state_e state, int ti_pri,
|
|
sigset_t *ti_sigmask_p, unsigned int ti_user_flags)
|
|
{
|
|
int pthread_threads_max;
|
|
struct pthread_handle_struct *phc;
|
|
td_err_e result = TD_OK;
|
|
int cnt;
|
|
#ifdef ALL_THREADS_STOPPED
|
|
int num;
|
|
#else
|
|
# define num 1
|
|
#endif
|
|
|
|
LOG ("td_ta_thr_iter");
|
|
|
|
/* Test whether the TA parameter is ok. */
|
|
if (! ta_ok (ta))
|
|
return TD_BADTA;
|
|
|
|
pthread_threads_max = ta->pthread_threads_max;
|
|
phc = (struct pthread_handle_struct *) alloca (sizeof (phc[0])
|
|
* pthread_threads_max);
|
|
|
|
/* First read only the main thread and manager thread information. */
|
|
if (ps_pdread (ta->ph, ta->handles, phc,
|
|
sizeof (struct pthread_handle_struct) * 2) != PS_OK)
|
|
return TD_ERR; /* XXX Other error value? */
|
|
|
|
/* Now handle these descriptors. */
|
|
result = handle_descr (ta, callback, cbdata_p, state, ti_pri, 0,
|
|
phc[0].h_descr);
|
|
if (result != TD_OK)
|
|
return result;
|
|
result = handle_descr (ta, callback, cbdata_p, state, ti_pri, 1,
|
|
phc[1].h_descr);
|
|
if (result != TD_OK)
|
|
return result;
|
|
|
|
/* Read all the descriptors. */
|
|
if (ps_pdread (ta->ph, ta->handles + 2, &phc[2],
|
|
(sizeof (struct pthread_handle_struct)
|
|
* (pthread_threads_max - 2))) != PS_OK)
|
|
return TD_ERR; /* XXX Other error value? */
|
|
|
|
#ifdef ALL_THREADS_STOPPED
|
|
/* Read the number of currently active threads. */
|
|
if (ps_pdread (ta->ph, ta->pthread_handles_num, &num, sizeof (int)) != PS_OK)
|
|
return TD_ERR; /* XXX Other error value? */
|
|
#endif
|
|
|
|
/* Now get all descriptors, one after the other. */
|
|
for (cnt = 2; cnt < pthread_threads_max && num > 0; ++cnt)
|
|
if (phc[cnt].h_descr != NULL)
|
|
{
|
|
#ifdef ALL_THREADS_STOPPED
|
|
/* First count this active thread. */
|
|
--num;
|
|
#endif
|
|
|
|
result = handle_descr (ta, callback, cbdata_p, state, ti_pri, cnt,
|
|
phc[cnt].h_descr);
|
|
if (result != TD_OK)
|
|
break;
|
|
}
|
|
|
|
return result;
|
|
}
|